From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
When we're scrubbing various btrees, cross-reference the records with
the bnobt to ensure that we don't also think the space is free.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
v2: streamline scrubber arguments, remove stack allocated objects
---
fs/xfs/scrub/agheader.c | 87 +++++++++++++++++++++++++++++++++++++++++++++++
fs/xfs/scrub/alloc.c | 19 ++++++++++
fs/xfs/scrub/bmap.c | 19 ++++++++++
fs/xfs/scrub/btree.c | 5 +++
fs/xfs/scrub/ialloc.c | 2 +
fs/xfs/scrub/inode.c | 15 ++++++++
fs/xfs/scrub/refcount.c | 2 +
fs/xfs/scrub/rmap.c | 5 +++
fs/xfs/scrub/scrub.h | 4 ++
9 files changed, 158 insertions(+)
diff --git a/fs/xfs/scrub/agheader.c b/fs/xfs/scrub/agheader.c
index 1477aad..58e544b 100644
--- a/fs/xfs/scrub/agheader.c
+++ b/fs/xfs/scrub/agheader.c
@@ -107,8 +107,23 @@ xfs_scrub_superblock_xref(
struct xfs_scrub_context *sc,
struct xfs_buf *bp)
{
+ struct xfs_mount *mp = sc->mp;
+ xfs_agnumber_t agno = sc->sm->sm_agno;
+ xfs_agblock_t agbno;
+ int error;
+
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
+
+ agbno = XFS_SB_BLOCK(mp);
+
+ error = xfs_scrub_ag_init(sc, agno, &sc->sa);
+ if (!xfs_scrub_xref_process_error(sc, agno, agbno, &error))
+ return;
+
+ xfs_scrub_xref_is_used_space(sc, agbno, 1);
+
+ /* scrub teardown will take care of sc->sa for us */
}
/*
@@ -406,13 +421,52 @@ xfs_scrub_superblock(
/* AGF */
+/* Tally freespace record lengths. */
+STATIC int
+xfs_scrub_agf_record_bno_lengths(
+ struct xfs_btree_cur *cur,
+ struct xfs_alloc_rec_incore *rec,
+ void *priv)
+{
+ xfs_extlen_t *blocks = priv;
+
+ (*blocks) += rec->ar_blockcount;
+ return 0;
+}
+
/* Cross-reference with the other btrees. */
STATIC void
xfs_scrub_agf_xref(
struct xfs_scrub_context *sc)
{
+ struct xfs_mount *mp = sc->mp;
+ struct xfs_agf *agf = XFS_BUF_TO_AGF(sc->sa.agf_bp);
+ xfs_agblock_t agbno;
+ xfs_extlen_t blocks;
+ int error;
+
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
+
+ agbno = XFS_AGF_BLOCK(mp);
+
+ error = xfs_scrub_ag_btcur_init(sc, &sc->sa);
+ if (error)
+ return;
+
+ xfs_scrub_xref_is_used_space(sc, agbno, 1);
+
+ /* Check agf_freeblks */
+ if (sc->sa.bno_cur) {
+ blocks = 0;
+ error = xfs_alloc_query_all(sc->sa.bno_cur,
+ xfs_scrub_agf_record_bno_lengths, &blocks);
+ if (xfs_scrub_should_check_xref(sc, &error, &sc->sa.bno_cur) &&
+ blocks != be32_to_cpu(agf->agf_freeblks))
+ xfs_scrub_block_xref_set_corrupt(sc, sc->sa.agf_bp);
+ }
+
+ /* scrub teardown will take care of sc->sa for us */
}
/* Scrub the AGF. */
@@ -514,6 +568,8 @@ xfs_scrub_agfl_block_xref(
{
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
+
+ xfs_scrub_xref_is_used_space(sc, agbno, 1);
}
/* Scrub an AGFL block. */
@@ -554,8 +610,25 @@ STATIC void
xfs_scrub_agfl_xref(
struct xfs_scrub_context *sc)
{
+ struct xfs_mount *mp = sc->mp;
+ xfs_agblock_t agbno;
+ int error;
+
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
+
+ agbno = XFS_AGFL_BLOCK(mp);
+
+ error = xfs_scrub_ag_btcur_init(sc, &sc->sa);
+ if (error)
+ return;
+
+ xfs_scrub_xref_is_used_space(sc, agbno, 1);
+
+ /*
+ * Scrub teardown will take care of sc->sa for us. Leave sc->sa
+ * active so that the agfl block xref can use it too.
+ */
}
/* Scrub the AGFL. */
@@ -630,8 +703,22 @@ STATIC void
xfs_scrub_agi_xref(
struct xfs_scrub_context *sc)
{
+ struct xfs_mount *mp = sc->mp;
+ xfs_agblock_t agbno;
+ int error;
+
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
+
+ agbno = XFS_AGI_BLOCK(mp);
+
+ error = xfs_scrub_ag_btcur_init(sc, &sc->sa);
+ if (error)
+ return;
+
+ xfs_scrub_xref_is_used_space(sc, agbno, 1);
+
+ /* scrub teardown will take care of sc->sa for us */
}
/* Scrub the AGI. */
diff --git a/fs/xfs/scrub/alloc.c b/fs/xfs/scrub/alloc.c
index 03ed403..564c76b 100644
--- a/fs/xfs/scrub/alloc.c
+++ b/fs/xfs/scrub/alloc.c
@@ -113,3 +113,22 @@ xfs_scrub_cntbt(
{
return xfs_scrub_allocbt(sc, XFS_BTNUM_CNT);
}
+
+/* xref check that the extent is not free */
+void
+xfs_scrub_xref_is_used_space(
+ struct xfs_scrub_context *sc,
+ xfs_agblock_t bno,
+ xfs_extlen_t len)
+{
+ bool is_freesp;
+ int error;
+
+ if (sc->sa.bno_cur)
+ return;
+
+ error = xfs_alloc_has_record(sc->sa.bno_cur, bno, len, &is_freesp);
+ if (xfs_scrub_should_check_xref(sc, &error, &sc->sa.bno_cur) &&
+ is_freesp)
+ xfs_scrub_btree_xref_set_corrupt(sc, sc->sa.bno_cur, 0);
+}
diff --git a/fs/xfs/scrub/bmap.c b/fs/xfs/scrub/bmap.c
index b693192..7e8e239 100644
--- a/fs/xfs/scrub/bmap.c
+++ b/fs/xfs/scrub/bmap.c
@@ -119,8 +119,27 @@ xfs_scrub_bmap_extent_xref(
struct xfs_btree_cur *cur,
struct xfs_bmbt_irec *irec)
{
+ struct xfs_mount *mp = info->sc->mp;
+ xfs_agnumber_t agno;
+ xfs_agblock_t agbno;
+ xfs_extlen_t len;
+ int error;
+
if (info->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
+
+ agno = XFS_FSB_TO_AGNO(mp, irec->br_startblock);
+ agbno = XFS_FSB_TO_AGBNO(mp, irec->br_startblock);
+ len = irec->br_blockcount;
+
+ error = xfs_scrub_ag_init(info->sc, agno, &info->sc->sa);
+ if (!xfs_scrub_fblock_process_error(info->sc, info->whichfork,
+ irec->br_startoff, &error))
+ return;
+
+ xfs_scrub_xref_is_used_space(info->sc, agbno, len);
+
+ xfs_scrub_ag_free(info->sc, &info->sc->sa);
}
/* Scrub a single extent record. */
diff --git a/fs/xfs/scrub/btree.c b/fs/xfs/scrub/btree.c
index 3bb88d8..3dbac4c 100644
--- a/fs/xfs/scrub/btree.c
+++ b/fs/xfs/scrub/btree.c
@@ -378,9 +378,11 @@ xfs_scrub_btree_check_block_owner(
xfs_daddr_t daddr)
{
xfs_agnumber_t agno;
+ xfs_agblock_t agbno;
int error = 0;
agno = xfs_daddr_to_agno(bs->cur->bc_mp, daddr);
+ agbno = xfs_daddr_to_agbno(bs->cur->bc_mp, daddr);
if (bs->cur->bc_flags & XFS_BTREE_LONG_PTRS) {
error = xfs_scrub_ag_init(bs->sc, agno, &bs->sc->sa);
@@ -389,6 +391,9 @@ xfs_scrub_btree_check_block_owner(
return error;
}
+ /* Cross-reference with the bnobt. */
+ xfs_scrub_xref_is_used_space(bs->sc, agbno, 1);
+
if (bs->cur->bc_flags & XFS_BTREE_LONG_PTRS)
xfs_scrub_ag_free(bs->sc, &bs->sc->sa);
diff --git a/fs/xfs/scrub/ialloc.c b/fs/xfs/scrub/ialloc.c
index 9294148..4526894 100644
--- a/fs/xfs/scrub/ialloc.c
+++ b/fs/xfs/scrub/ialloc.c
@@ -69,6 +69,8 @@ xfs_scrub_iallocbt_chunk_xref(
{
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
+
+ xfs_scrub_xref_is_used_space(sc, agbno, len);
}
/* Is this chunk worth checking? */
diff --git a/fs/xfs/scrub/inode.c b/fs/xfs/scrub/inode.c
index 2aa12e1..be9cf19 100644
--- a/fs/xfs/scrub/inode.c
+++ b/fs/xfs/scrub/inode.c
@@ -584,8 +584,23 @@ xfs_scrub_inode_xref(
xfs_ino_t ino,
struct xfs_dinode *dip)
{
+ xfs_agnumber_t agno;
+ xfs_agblock_t agbno;
+ int error;
+
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
+
+ agno = XFS_INO_TO_AGNO(sc->mp, ino);
+ agbno = XFS_INO_TO_AGBNO(sc->mp, ino);
+
+ error = xfs_scrub_ag_init(sc, agno, &sc->sa);
+ if (!xfs_scrub_xref_process_error(sc, agno, agbno, &error))
+ return;
+
+ xfs_scrub_xref_is_used_space(sc, agbno, 1);
+
+ xfs_scrub_ag_free(sc, &sc->sa);
}
/* Scrub an inode. */
diff --git a/fs/xfs/scrub/refcount.c b/fs/xfs/scrub/refcount.c
index 4c550b3..09a04ae 100644
--- a/fs/xfs/scrub/refcount.c
+++ b/fs/xfs/scrub/refcount.c
@@ -60,6 +60,8 @@ xfs_scrub_refcountbt_xref(
{
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
+
+ xfs_scrub_xref_is_used_space(sc, agbno, len);
}
/* Scrub a refcountbt record. */
diff --git a/fs/xfs/scrub/rmap.c b/fs/xfs/scrub/rmap.c
index 8655948..54b0eac 100644
--- a/fs/xfs/scrub/rmap.c
+++ b/fs/xfs/scrub/rmap.c
@@ -57,8 +57,13 @@ xfs_scrub_rmapbt_xref(
struct xfs_scrub_context *sc,
struct xfs_rmap_irec *irec)
{
+ xfs_agblock_t agbno = irec->rm_startblock;
+ xfs_extlen_t len = irec->rm_blockcount;
+
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
+
+ xfs_scrub_xref_is_used_space(sc, agbno, len);
}
/* Scrub an rmapbt record. */
diff --git a/fs/xfs/scrub/scrub.h b/fs/xfs/scrub/scrub.h
index 2a79614..006e396 100644
--- a/fs/xfs/scrub/scrub.h
+++ b/fs/xfs/scrub/scrub.h
@@ -123,4 +123,8 @@ xfs_scrub_quota(struct xfs_scrub_context *sc)
}
#endif
+/* cross-referencing helpers */
+void xfs_scrub_xref_is_used_space(struct xfs_scrub_context *sc,
+ xfs_agblock_t bno, xfs_extlen_t len);
+
#endif /* __XFS_SCRUB_SCRUB_H__ */
--
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